Vehicle rollover sensing using short-term integration
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United States of America Patent
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Mar 14, 2000
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N/A
app pub date -
Feb 6, 1998
filing date -
Feb 6, 1998
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Abstract
A rollover sensing apparatus and method are provided for predicting rollover and/or pitchover conditions of a vehicle. An angular rate sensor senses attitude rate of the vehicle and an accelerometer measures vertical acceleration of the vehicle. A current attitude angle is estimated by integration, and a future attitude angle is predicted at an advance time as a function of the estimated current attitude angle and sensed attitude rate. The predicted attitude angle is compared to a threshold and an output is produced for indicating a predicted vehicle rollover condition based on the comparison. A vehicle rollover condition about the longitudinal axis of the vehicle is predicted by comparing a future roll angle to a rollover angle threshold, while a pitchover condition about the lateral axis of a vehicle is predicted by comparing a future pitch angle to a pitch angle threshold.
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